Rotary engine.



DI F. MINUTI ROTARY ENGINE'.

APPLICATION FILED AUG,2II I9I5.

LSIQQI.

Patented Api: 23, 1918.

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To all whom it mayconoem:

Be it known that l, DOUGLAS F. Armor, a citizen of the United States, residing at Orange, in the county of Franklin and State of Massachusetts, have. invented certain new and useful improvements in -Rotary Engines, of which the following is a speciication.

r)This invention. has relation. to Huid pressure engines ot the rotary type, and the nature and object thereof. will he readily apparent to those skilled in the art to which it appertains, in the light ot the following explanation ot the accompanying drawings, illustrating what l now believe to he the preferred embodiment or mechanical errores .siona oi my invention troni among other iorrns and arrangements within the spirit lill thereof or the scope ot the appended. claim.

llloweven an object oi the invention is to provide rotary engine particularly adapted for marine "use, and to that end embodies a new and novel duid pressure controllingvalve, whereby the direction of rotation ot the rotor may be quickly reversed or the engine completely stopped.

Another .object of the invention is to pro vide a rotary engine in which the rotor is mounted concentrically within the casing, and inwhich the inner wall of the cylinder l is so 'formed adjacent the point ot pressure inlet so as to permit the pressure to exert an i initial impulse against the abutment whereby an increase oit power is obtained in this engine, over others ot a similar type.

llnhddition to the foregoing, by invention comprehends improvements in the details oi? construction and arrangement ot parts to be hereinafterv more tully described andpparuV ticularly pointed out in the appended claim. lin the accompanying drawings inwhich similar and corresponding parte are desigm natcd by the same characters ot reference throughout the several views in which they appear: u

' Figure l, is a view in vertical sectionw'ith parts in elevation of a rotary engine constructed alter the manner of my invention. .Fig 2, is a view thereot'in end elevation with parts orokfenaavvay Fig. 3, is a. detail transverse section talren' through the valve.

Specification ci Letters'ltatent lPfgy,-,@mtg@d tyyy' ,92.12339 gljio .application mea .august entere. sei-.iai no. iisg-11a.

With reference to the drawings, l indi# cates a cylindrical casing, closed at either end by nieans ci' removable end plates 2. l'l'ach plate 2 is provided with a transverse central opening, in alineinent, providing bearings tor a power shaft 3 which extends' through the casing.

A rotor l is mounted concentrically upon the shaft 3, and is provided at uniformly spaced intervals about its circumference,

with. radially and inwardly extending recesses 5 tor the reception of'sliding'abut niente t coil spring or the like 7 is 'disposed between the under side of each ahntment, and within the recesses 5 and is adapted to hear against the bottom ot said recesses to normally hold the abutment outward. 'lhe interior wall of the casing is formed for oneehalf its circumference vizthe upper portion thereof, concentrically with the axis of the shaft 3 while the re.

niainder of the wall is formed along the lines or a compound curve, the lower portion of the-inner wall oli the casing being dis posed concentrically to the surface ot the rotor, very closely spacedtheretrom tor'a short distance to each side ot the vertical center ot the casing. 0n Fig, l ot the drawings this curvature of the wall extends :trom o to o. From the point b the inner wall ot the casing is formed into a rapid curve coinciding with the concentric wall ot' the casing' at the horizontal center ofthe casing indicated at c, while the lett side of the casing is formed symmetrically with relation to the right side, the wall of the casing curvingr rapidly from the point e to the v point al. rllhe casing is rested upon one side'in a lhase portion 8, having lower attaching tlanges 9. The base portion is further protti.

the cylinder adjacentithe points a and b respectively. The lower ends of the ports are adapted to enter the opening 10. A tubular valve is. inserted in the opening, `said tubular valve being provided with a pair of openings 16 and 17 located in its side walls and .suitably spaced longitudinally of the valve so as to register with the ports 13 and 14 successively .in different rotative positions of the valve. .T he rear end of the .valve is open and is adapted to vregister with .the supply 11, while the forward end oli the valve is closed as at 1'8, A plate 19 is bolted to thefforward end of the base, by means of bolts 20, whereby the valve is retained in its opening. The plate 19 is formed with an opening provided with a I"packing gland 21 "through which a valve stem 22 passes,

said valve stem 22 having threaded engage-l ment with the closed-end 18 of the valve. A circle is inscribed concentrically about the valve 22 upon the plate 19, and certain indications are marked upon the circles to which reference is had by means of a pointer -23 mounted upon the valve 22, for rotationI therewith. A wheel 24C serving as a handle for the valve stem 22 is. provided whereby said valve stem may be rotated.

With the valve disposed in the position shown in Fig. 1, the opening 16 therefrom and the ports 13 are in registration whereby luid pressure entering the valve through pipe 11 may enter thel channel-in the cas-v right hand side thereof.

lf the engine is to be stopped, the valve is rotated so as to dispose neither of its ports in registration with the aforesaid ports`13. and 14 whereupon the fluid pressure is cut off. rIbis position of the valve is arrived at when the pointer 23 is disposed vertically.

it is to be observed in connection witli` the entrance of the iluid into the casing, that the radialmovement of the abutment after the same has passed one of the ports 13 or I 14 will be relatively rapid, thus imparting an initial strong impulse to therotor. r1`he inward movement of the abutment from the point c to b to exhaust the spent fluid is very rapid, as is also the outward movement of the abutment after receiving an impulse from the pointaxto a?.

Owing to the provision of the valve 15, this engine is especially applicable to marine use, as the boat propelling mechanism may be quickly reversed.

Coincidentally with the admission of fluid pressure through either of the ports 13 and .14, the establishment of an exhaust port is automatically taken carev of in the following manner: At diametrically opposite points of the ports 1G and 17 ot' the cylinder valve, there are located cavities 13a and 14a respectively. These cavitiesare on the exterior of the cylinder and have no communication with the interior thereof. They are however, connected by means of a spiral groove 18a; with reference to Fig. 3 of the drawings it will be noted that the said groove extends substantially one-half the circumference of the valve, and at diametrically opposite points in the valve seat, there is provided. oppositely extending exhaust ports 18b and 18" adapted for successive communication with the spiral groove 18 in dilerent positions of the valve. Thus, upon reference to Fig. 1, it will be noted that the port 111 is employed as an exhaust port, the spent `fluid entering thereto from the cylinder, into the cavity 14, along the spiral groove 18'nl to the exhaust port 18". If the valve is turned in an opposite direction so as to bring the cavity 13a into registration with the port 13 so as to employ said portas an exhaust port, the spent fluid vpressure will enter the cavity 13a along the grooves 18a and issue from the exhaust port 18C. Thus it will be seen, either port 13 or 14; may be used interchangeably as an inlet and exhaust port. A second exhaust port may also be provided at the upper portion of the engine casing as indicated at 25 to exhaust most of the fluid, and relieve the pressure, the balance of the spent pressure and including the water of condensation being passed through either of the ports 13 and 14. in the manner above set forth.

While 1 have illustrated and described my invention with some degree of particularity, l realize that in practice various alterations thereover may be made, and I therefore reserve the right and privilege of changing the form cf the details of construction, or otherwise altering the arranfement of the fro-related parts, without eparting from the spirit of the invention or the scope of the appended claim.

Having thus described my invention what 1 claim as new and desire to secure by Letters Patent is:

In a rotary engine, a casing havin. a pair of parallel intake ports, a valve ciliamber in communication with said ports, a. steam supply port at one end of the valve chamber and a pair of exhaust ports leading from said valve chamber at opposite sides between lil() moese-e the intake ports, a tubular valve fitting the with either or the intake ports9 and means valve chamber with one end openinginto for rotating the valve. El@ the steam supply port, and having a pair lin testimony whereof li ax my signature of longitudinally spaced ports at opposite in presence of two Witnesses.

5 sides for alternate registration with the in- DUGLAS F. ARNOT. take ports, and a spiral cavity for eom- Witnesses: munication at its intermediate portion with PHILIP S. PERLEY, either of the exhaust ports and at its ends @mums E., ULAUGHHN. 

